the study appears in environmental science and tech following journal. >> a drug commonly prescribed to control heart rhythm could prove fatal. a study suggests it increases the risk of death fr patients, it occurs when upper chambers contract chaoticly. a study says people who took it for six months had a 61% of dying. >> it seems a study find both on their own reduce chances of people with high cholesterol from die bug together had a rater affect. researchers say exercise can be moderate such as a brisk walk, just 30 minutes per day. >> first lady hosted military families and children to help decorate the white house for christmas part of the joining forces campaign connecting veteran with resources to help them find jobs. the first lady announced the theme is joy to all. and talked about the tree dedicated to the military. >> it's a special joining forces tree. it's covered. with hand decorated ornaments made by children living in u.s. bases around the world. we have spent months and months gathering beautiful ornaments. and the first lady says there are 54 trees and many need a c